It should be okay. While I've never made this specific recipe (I don't follow recipes), I've made essentially the same dish often using sesame seeds instead of red pepper flakes. I also prefer grated fresh garlic over powder.

That said, I would prefer these warm versus cold.

I always make extra of these kind of beans and I always reheat them. But that's just me...

Yes, it's delish hot, warm, room temp or cold. I increased the chili flakes because the amount called for was not enough for me. I also used grape seed oil instead of olive oil and added a little sesame oil at the end. Browning the beans and slightly cooking the garlic and ginger is key.